Optical imaging lens assembly, image capturing unit and electronic device

ABSTRACT

An optical imaging lens assembly includes, in order from an object side to an image side: a first, a second, a third, a fourth, a fifth and a sixth lens elements. The first lens element has negative refractive power. The second lens element has an object-side surface being concave in a paraxial region thereof. The third lens element has an object-side surface being convex in a paraxial region thereof. The fifth lens element with negative refractive power has an object-side surface being concave and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an image-side surface being concave in a paraxial region thereof. At least one of an object-side surface and the image-side surface of the sixth lens element has at least one critical point in an off-axis region thereof, wherein both the surfaces of the sixth lens element are aspheric.

RELATED APPLICATIONS

This application is a continuation patent application of U.S.application Ser. No. 15/867,469 filed on Jan. 10, 2018, which claimspriority to Taiwan Application 106137100, filed on Oct. 27, 2017, whichis incorporated by reference herein in its entirety.

BACKGROUND Technical Field

The present disclosure relates to an optical imaging lens assembly, animage capturing unit and an electronic device, more particularly to anoptical imaging lens assembly and an image capturing unit applicable toan electronic device.

Description of Related Art

In recent years, with the popularity of electronic devices having camerafunctionalities, the demand for miniaturized optical systems has beenincreasing. As advanced semiconductor manufacturing technologies havereduced the pixel size of image sensors, and compact optical systemshave gradually evolved toward the field of higher megapixels, there isan increasing demand for compact optical systems featuring better imagequality.

For various applications, the optical systems have been widely appliedto different kinds of electronic devices, such as vehicle devices, imagerecognition systems, entertainment devices, sport devices andintelligent home systems. Furthermore, in order to provide better userexperience, electronic devices equipped with one or more optical systemshave become the mainstream products on the market, and the opticalsystems are developed with various optical features according todifferent requirements.

As the size of electronic devices getting smaller and smaller, it isdifficult for conventional optical systems, to meet the requirements ofhigh-end specification and compact size, especially requirements such asa large aperture or a wide field of view. Generally, in order to achievecompactness, a first lens element of a miniaturized optical systemusually has positive refractive power, and a second lens element usuallyhas negative refractive power. However, it is difficult for light from alarge field of view to travel into the miniaturized optical system dueto strong positive refractive power of the first lens element, therebyfailing to achieve a wide angle configuration. On the other hand, aconventional wide-angle optical system usually has a first lens elementwith negative refractive power for gathering light from the large fieldof view. However, the total track length of the wide-angle opticalsystem is increased due to the negative refractive power of the firstlens element, thereby unable to achieve compactness. Therefore, there isa need to develop an optical system featuring wide field of view andcompact size while having a first lens element with negative refractivepower.

SUMMARY

According to one aspect of the present disclosure, an optical imaginglens assembly includes six lens elements. The six lens elements are, inorder from an object side to an image side, a first lens element, asecond lens element, a third lens element, a fourth lens element, afifth lens element and a sixth lens element. The first lens element hasnegative refractive power. The second lens element has an object-sidesurface being concave in a paraxial region thereof. The third lenselement has an object-side surface being convex in a paraxial regionthereof. The fifth lens element with negative refractive power has anobject-side surface being concave in a paraxial region thereof and animage-side surface being convex in a paraxial region thereof. The sixthlens element has an image-side surface being concave in a paraxialregion thereof. At least one of an object-side surface and theimage-side surface of the sixth lens element has at least one criticalpoint in an off-axis region thereof, and the object-side surface and theimage-side surface of the sixth lens element are both aspheric. When afocal length of the optical imaging lens assembly is f, and a curvatureradius of the image-side surface of the fifth lens element is R10, thefollowing condition is satisfied:

f/R10<−0.65.

According to another aspect of the present disclosure, an imagecapturing unit includes the aforementioned optical imaging lens assemblyand an image sensor, wherein the image sensor is disposed on an imagesurface of the optical imaging lens assembly.

According to still another aspect of the present disclosure, anelectronic device includes the aforementioned image capturing unit.

According to yet another aspect of the present disclosure, an opticalimaging lens assembly includes six lens elements. The six lens elementsare, in order from an object side to an image side, a first lenselement, a second lens element, a third lens element, a fourth lenselement, a fifth lens element and a sixth lens element. The first lenselement has negative refractive power. The second lens element has anobject-side surface being concave in a paraxial region thereof and animage-side surface being convex in a paraxial region thereof. The thirdlens element has an object-side surface being convex in a paraxialregion thereof. The fifth lens element has negative refractive power.The sixth lens element has an image-side surface being concave in aparaxial region thereof. At least one of an object-side surface and theimage-side surface of the sixth lens element has at least one criticalpoint in an off-axis region thereof, and the object-side surface and theimage-side surface of the sixth lens element are both aspheric. When acurvature radius of the object-side surface of the third lens element isR5, and a curvature radius of an image-side surface of the third lenselement is R6, the following condition is satisfied:

(R5+R6)/(R5−R6)<0.20.

According to yet still another aspect of the present disclosure, anoptical imaging lens assembly includes six lens elements. The six lenselements are, in order from an object side to an image side, a firstlens element, a second lens element, a third lens element, a fourth lenselement, a fifth lens element and a sixth lens element. The first lenselement has negative refractive power. The second lens element has anobject-side surface being concave in a paraxial region thereof. Thethird lens element has an object-side surface being convex in a paraxialregion thereof and an image-side surface being concave in a paraxialregion thereof. The fifth lens element has negative refractive power.The sixth lens element has an image-side surface being concave in aparaxial region thereof. At least one of an object-side surface and theimage-side surface of the sixth lens element has at least one criticalpoint in an off-axis region thereof, and the object-side surface and theimage-side surface of the sixth lens element are both aspheric.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be better understood by reading the followingdetailed description of the embodiments, with reference made to theaccompanying drawings as follows:

FIG. 1 is a schematic view of an image capturing unit according to the1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 1stembodiment;

FIG. 3 is a schematic view of an image capturing unit according to the2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 2ndembodiment;

FIG. 5 is a schematic view of an image capturing unit according to the3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 3rdembodiment;

FIG. 7 is a schematic view of an image capturing unit according to the4th embodiment of the present disclosure; FIG. 8 shows sphericalaberration curves, astigmatic field curves and a distortion curve of theimage capturing unit according to the 4th embodiment;

FIG. 9 is a schematic view of an image capturing unit according to the5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 5thembodiment;

FIG. 11 is a schematic view of an image capturing unit according to the6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 6thembodiment;

FIG. 13 is a schematic view of an image capturing unit according to the7th embodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 7thembodiment;

FIG. 15 is a schematic view of an image capturing unit according to the8th embodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 8thembodiment;

FIG. 17 is a schematic view of an image capturing unit according to the9th embodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 9thembodiment;

FIG. 19 is a schematic view of an image capturing unit according to the10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 10thembodiment;

FIG. 21 is a perspective view of an image capturing unit according tothe 11th embodiment of the present disclosure;

FIG. 22 is one perspective view of an electronic device according to the12th embodiment of the present disclosure;

FIG. 23 is another perspective view of the electronic device in FIG. 22;

FIG. 24 is a block diagram of the electronic device in FIG. 22; and

FIG. 25 shows a schematic view of Yc61, Yc62 and critical points on anobject-side surface and an image-side surface of a sixth lens element,according to the 4th embodiment of the present disclosure.

DETAILED DESCRIPTION

An optical imaging lens assembly includes six lens elements. The sixlens elements are, in order from an object side to an image side, afirst lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element and a sixth lens element.

The first lens element has negative refractive power. Therefore, it isfavorable for providing the optical imaging lens assembly with awide-angle lens configuration to gather light from a large field ofview.

The second lens element has an object-side surface being concave in aparaxial region thereof, and the second lens element can have animage-side surface being convex in a paraxial region thereof. Therefore,it is favorable for correcting aberrations generated by the first lenselement so as to improve the image quality.

The third lens element can have positive refractive power; therefore, itis favorable for the optical imaging lens assembly to gather light fromthe large field of view. The third lens element has an object-sidesurface being convex in a paraxial region thereof, and the third lenselement can have an image-side surface being concave in a paraxialregion thereof; therefore, it is favorable for a shape of the third lenselement configured with a shape of the second lens element so as toprevent a total track length of the optical imaging lens assembly frombeing overly long due to the first lens element having negativerefractive power, and for correcting aberrations generated by the firstlens element so as to further improve the image quality. The image-sidesurface of the third lens element can have at least one convex criticalpoint in an off-axis region thereof; therefore, it is favorable forcorrecting astigmatism and field curvature in the off-axis region.

The fourth lens element can have positive refractive power. Therefore,it is favorable for properly distributing the positive refractive poweron the third lens element and the fourth lens element so as to reducethe sensitivity of the optical imaging lens assembly.

The fifth lens element has negative refractive power; therefore, it isfavorable for balancing the positive refractive power of the fourth lenselement and correcting chromatic aberration. The fifth lens element canhave an object-side surface being concave in a paraxial region thereofand an image-side surface being convex in a paraxial region thereof;therefore, it is favorable for correcting astigmatism so as to improvethe image quality. The image-side surface of the fifth lens element canhave at least one concave critical point in an off-axis region thereof;therefore, it is favorable for correcting off-axis aberrations so as tofurther improve the image quality.

The sixth lens element has an image-side surface being concave in aparaxial region thereof, and at least one of an object-side surface andthe image-side surface of the sixth lens element has at least onecritical point in an off-axis region thereof. Therefore, it is favorablefor correcting the Petzval sum so as to flatten an image surface whilecorrecting off-axis aberrations.

When a focal length of the optical imaging lens assembly is f, and acurvature radius of the image-side surface of the fifth lens element isR10, the following condition can be satisfied: f/R10<−0.65. Therefore,it is favorable for strengthening the negative refractive power of thefifth lens element for correcting aberrations so as to improveperipheral image quality and increase relative illuminance on theperiphery of the image surface; furthermore, it is favorable forensuring a proper ratio of a central thickness to a peripheral thicknessof the fifth lens element so as to avoid molding and assemblingproblems. Preferably, the following condition can be satisfied:−3.0<f/R10<−0.80. More preferably, the following condition can also besatisfied: −3.0<f/R10<−1.0.

When a curvature radius of the object-side surface of the third lenselement is R5, and a curvature radius of the image-side surface of thethird lens element is R6, the following condition can be satisfied:(R5+R6)/(R5−R6)<0.20. Therefore, it is favorable for light from thelarge field of view to travel into the optical imaging lens assembly andconverge onto the image surface. Preferably, the following condition canbe satisfied: −4.5<(R5+R6)/(R5−R6)<−0.40. More preferably, the followingcondition can also be satisfied: −3.0<(R5+R6)/(R5−R6)<−1.0.

When an f-number of the optical imaging lens assembly is Fno, thefollowing condition can be satisfied: 1.20<Fno<2.40. Therefore, it isfavorable for providing a large aperture stop so as to capturesufficient image data in lowlight (e.g., night-time) or short exposure(e.g., dynamic photography) conditions; furthermore, it is favorable forincreasing imaging speed so as to achieve high image quality in awell-lit condition.

When a maximum field of view of the optical imaging lens assembly isFOV, the following condition can be satisfied: 110 [deg.]<FOV<220[deg.]. Therefore, it is favorable for obtaining a wide angle effect.

When a sum of axial distances between every adjacent lens elements ofthe optical imaging lens assembly is ΣAT, and an axial distance betweenthe first lens element and the second lens element is T12, the followingcondition can be satisfied: 1.0<ΣAT/T12<2.75. Therefore, it is favorablefor obtaining a tight arrangement of the lens elements and betterfitting with one another so as to increase manufacturing yield.Preferably, the following condition can also be satisfied:1.0<ΣAT/T12<2.0.

When a central thickness of the second lens element is CT2, and acentral thickness of the third lens element is CT3, the followingcondition can be satisfied: 1.0<CT2/CT3. Therefore, it is favorable forpreventing the third lens element from being overly thick and overlysmall space between the third lens element and its adjacent lenselements.

According to the present disclosure, an absolute value of a curvatureradius of the object-side surface of the fifth lens element is thesmallest among absolute values of curvature radii of all lens surfacesof the six lens elements. That is, among the absolute values of thecurvature radii of object-side surfaces and image-side surfaces of thefirst through the sixth lens elements, the absolute value of thecurvature radius of the object-side surface of the fifth lens element isthe smallest. Therefore, it is favorable for the object-side surface ofthe fifth lens element to have a proper curvature radius so as toprovide sufficient negative refractive power for correcting aberrations,and further reduce the total track length of the optical imaging lensassembly.

When the focal length of the optical imaging lens assembly is f, and acurvature radius of the image-side surface of the sixth lens element isR12, the following condition can be satisfied: 0.75<f/R12. Therefore, itis favorable for reducing a back focal length of the optical imaginglens assembly so as to be applicable to compact devices.

When an Abbe number of the fifth lens element is V5, and an Abbe numberof the sixth lens element is V6, the following condition can besatisfied: V5+V6<65. Therefore, it is favorable for obtaining a balancebetween correction of chromatic aberration and correction ofastigmatism.

When a vertical distance between a non-axial critical point on theobject-side surface of the sixth lens element and an optical axis isYc61, and a vertical distance between a non-axial critical point on theimage-side surface of the sixth lens element and the optical axis isYc62, the following condition can be satisfied: 0.50<Yc61/Yc62<2.0.Therefore, it is favorable for correcting off-axis aberrations withimproved peripheral image quality so as to obtain a wide angle effectand high quality images. Please refer to FIG. 25, which shows aschematic view of Yc61, Yc62 and critical points C on the object-sidesurface and the image-side surface of the sixth lens according to the4th embodiment of the present disclosure. When the object-side surfaceor the image-side surface of the sixth lens element has a singlecritical point, Yc61 or Y62 is a vertical distance between that singlecritical point and the optical axis. When the object-side surface or theimage-side surface of the sixth lens element has a plurality of criticalpoints, Yc61 or Y62 can be a vertical distance between the criticalpoint closest to the optical axis of the plurality of critical pointsand the optical axis.

When a curvature radius of the object-side surface of the sixth lenselement is R11, the curvature radius of the image-side surface of thesixth lens element is R12, and a central thickness of the sixth lenselement is CT6, the following condition can be satisfied:|R11/CT6|+|R12/CT6|<10. Therefore, it is favorable for reducing the backfocal length of the optical imaging lens assembly so as to be applicableto miniaturized electronic devices.

When the focal length of the optical imaging lens assembly is f, acurvature radius of the object-side surface of the second lens elementis R3, and a curvature radius of the image-side surface of the secondlens element is R4, the following condition can be satisfied:0.60<|f/R3|+|f/R4|<3.0. Therefore, it is favorable for obtaining theproper shape of the second lens element corresponding to the first lenselement so as to prevent surface reflection in the off-axis region andensure light converging onto the image surface.

According to the present disclosure, the aforementioned features andconditions can be utilized in numerous combinations so as to achievecorresponding effects.

According to the present disclosure, the lens elements of the opticalimaging lens assembly can be made of either glass or plastic material.When the lens elements are made of glass material, the refractive powerdistribution of the optical imaging lens assembly may be more flexible.The glass lens element can either be made by grinding or molding. Whenthe lens elements are made of plastic material, the manufacturing costcan be effectively reduced. Furthermore, surfaces of each lens elementcan be arranged to be aspheric, which allows for more controllablevariables for eliminating the aberration thereof, the required number ofthe lens elements can be decreased, and the total track length of theoptical imaging lens assembly can be effectively reduced. The asphericsurfaces may be formed by plastic injection molding or glass molding.

According to the present disclosure, when a lens surface is aspheric, itmeans that the lens surface has an aspheric shape throughout itsoptically effective area, or a portion(s) thereof.

According to the present disclosure, each of an object-side surface andan image-side surface has a paraxial region and an off-axis region. Theparaxial region refers to the region of the surface where light raystravel close to the optical axis, and the off-axis region refers to theregion of the surface away from the paraxial region. Particularly,unless otherwise specified, when the lens element has a convex surface,it indicates that the surface is convex in the paraxial region thereof;when the lens element has a concave surface, it indicates that thesurface is concave in the paraxial region thereof. Moreover, when aregion of refractive power or focus of a lens element is not defined, itindicates that the region of refractive power or focus of the lenselement is in the paraxial region thereof.

According to the present disclosure, a critical point is a non-axialpoint of the lens surface where its tangent is perpendicular to theoptical axis.

According to the present disclosure, an image surface of the opticalimaging lens assembly, based on the corresponding image sensor, can beflat or curved, especially a curved surface being concave facing towardsthe object side of the optical imaging lens assembly.

According to the present disclosure, an image correction unit, such as afield flattener, can be optionally disposed between the lens elementclosest to the image side of the optical imaging lens assembly and theimage surface for correction of aberrations such as field curvature. Theoptical properties of the image correction unit, such as curvature,thickness, index of refraction, position and surface shape (convex orconcave surface with spherical, aspheric, diffractive or Fresnel types),can be adjusted according to the specification of an image capturingunit. In general, a preferable image correction unit is, for example, athin transparent element having a concave object-side surface and aplanar image-side surface, and the thin transparent element is disposednear the image surface.

According to the present disclosure, the optical imaging lens assemblycan include at least one stop, such as an aperture stop, a glare stop ora field stop. Said glare stop or said field stop is set for eliminatingthe stray light and thereby improving the image quality thereof.

According to the present disclosure, an aperture stop can be configuredas a front stop or a middle stop. A front stop disposed between animaged object and the first lens element can provide a longer distancebetween an exit pupil of the optical imaging lens assembly and the imagesurface to produce a telecentric effect, and thereby improves theimage-sensing efficiency of an image sensor (for example, CCD or CMOS).A middle stop disposed between the first lens element and the imagesurface is favorable for enlarging the viewing angle of the opticalimaging lens assembly and thereby provides a wider field of view for thesame.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an image capturing unit according to the1st embodiment of the present disclosure. FIG. 2 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 1stembodiment. In FIG. 1, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 190. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 110, a second lens element 120, a third lens element 130, anaperture stop 100, a fourth lens element 140, a fifth lens element 150,a sixth lens element 160, an IR-cut filter 170 and an image surface 180.The optical imaging lens assembly includes six lens elements (110, 120,130, 140, 150 and 160) with no additional lens element disposed betweeneach of the adjacent six lens elements.

The first lens element 110 with negative refractive power has anobject-side surface 111 being convex in a paraxial region thereof and animage-side surface 112 being concave in a paraxial region thereof. Thefirst lens element 110 is made of plastic material and has theobject-side surface 111 and the image-side surface 112 being bothaspheric.

The second lens element 120 with positive refractive power has anobject-side surface 121 being concave in a paraxial region thereof andan image-side surface 122 being convex in a paraxial region thereof. Thesecond lens element 120 is made of plastic material and has theobject-side surface 121 and the image-side surface 122 being bothaspheric.

The third lens element 130 with positive refractive power has anobject-side surface 131 being convex in a paraxial region thereof and animage-side surface 132 being planar in a paraxial region thereof. Thethird lens element 130 is made of plastic material and has theobject-side surface 131 and the image-side surface 132 being bothaspheric.

The fourth lens element 140 with positive refractive power has anobject-side surface 141 being convex in a paraxial region thereof and animage-side surface 142 being convex in a paraxial region thereof. Thefourth lens element 140 is made of plastic material and has theobject-side surface 141 and the image-side surface 142 being bothaspheric.

The fifth lens element 150 with negative refractive power has anobject-side surface 151 being concave in a paraxial region thereof andan image-side surface 152 being convex in a paraxial region thereof. Thefifth lens element 150 is made of plastic material and has theobject-side surface 151 and the image-side surface 152 being bothaspheric. The image-side surface 152 of the fifth lens element 150 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 160 with positive refractive power has anobject-side surface 161 being convex in a paraxial region thereof and animage-side surface 162 being concave in a paraxial region thereof. Thesixth lens element 160 is made of plastic material and has theobject-side surface 161 and the image-side surface 162 being bothaspheric. Each of the object-side surface 161 and the image-side surface162 of the sixth lens element 160 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 170 is made of glass material and located between thesixth lens element 160 and the image surface 180, and will not affectthe focal length of the optical imaging lens assembly. The image sensor190 is disposed on or near the image surface 180 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 151 of the fifth lens element 150 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 151 of the fifth lens element 150 is0.396.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}\text{/}R} \right)\text{/}\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y\text{/}R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{i} \right)}}}},$

where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from an optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient, and in the embodiments, i may be,but is not limited to, 4, 6, 8, 10 and 12.

In the optical imaging lens assembly of the image capturing unitaccording to the 1st embodiment, when a focal length of the opticalimaging lens assembly is f, an f-number of the optical imaging lensassembly is Fno, and half of a maximum field of view of the opticalimaging lens assembly is HFOV, these parameters have the followingvalues: f=1.11 millimeters (mm), Fno=2.05, HFOV=93.0 degrees (deg.).

When the maximum field of view of the optical imaging lens assembly isFOV, the following condition is satisfied: FOV=186.0 degrees. When anAbbe number of the fifth lens element 150 is V5, and an Abbe number ofthe sixth lens element 160 is V6, the following condition is satisfied:V5+V6=45.42.

When a curvature radius of the object-side surface 131 of the third lenselement 130 is R5, and a curvature radius of the image-side surface 132of the third lens element 130 is R6, the following condition issatisfied: (R5+R6)/(R5−R6)=−1.00.

When the focal length of the optical imaging lens assembly is f, acurvature radius of the object-side surface 121 of the second lenselement 120 is R3, and a curvature radius of the image-side surface 122of the second lens element 120 is R4, the following condition issatisfied: |f/R3|+|f/R4|=1.70.

When the focal length of the optical imaging lens assembly is f, and acurvature radius of the image-side surface 152 of the fifth lens element150 is R10, the following condition is satisfied: f/R10=−1.06.

When the focal length of the optical imaging lens assembly is f, and acurvature radius of the image-side surface 162 of the sixth lens element160 is R12, the following condition is satisfied: f/R12=1.07.

When a curvature radius of the object-side surface 161 of the sixth lenselement 160 is R11, the curvature radius of the image-side surface 162of the sixth lens element 160 is R12, and a central thickness of thesixth lens element 160 is CT6, the following condition is satisfied:|R11/CT6|+|R12/CT6|=6.30.

When a central thickness of the second lens element 120 is CT2, and acentral thickness of the third lens element 130 is CT3, the followingcondition is satisfied: CT2/CT3=2.46.

When a sum of axial distances between every adjacent lens elements ofthe optical imaging lens assembly is ΣAT, and an axial distance betweenthe first lens element 110 and the second lens element 120 is T12, thefollowing condition is satisfied: ΣAT/T12=1.61. In this embodiment, theaxial distance between two adjacent lens elements is the air gap in aparaxial region between the two adjacent lens elements.

When a vertical distance between a non-axial critical point on theobject-side surface 161 of the sixth lens element 160 and an opticalaxis is Yc61, and a vertical distance between a non-axial critical pointon the image-side surface 162 of the sixth lens element 160 and theoptical axis is Yc62, the following condition is satisfied:Yc61/Yc62=0.94.

The detailed optical data of the 1st embodiment are shown in Table 1 andthe aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 1.11 mm, Fno = 2.05, HFOV = 93.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Lens 1 5.553 (ASP) 0.500 Plastic 1.544 56.0−2.91 2 1.194 (ASP) 1.170 3 Lens 2 −1.479 (ASP) 0.822 Plastic 1.544 56.05.35 4 −1.173 (ASP) 0.030 5 Lens 3 1.902 (ASP) 0.334 Plastic 1.544 56.03.50 6 ∞ (ASP) −0.014 7 Ape. Stop Plano 0.397 8 Lens 4 4.835 (ASP) 0.724Plastic 1.544 56.0 1.13 6 −0.669 (ASP) 0.084 10 Lens 5 −0.396 (ASP)0.220 Plastic 1.669 19.5 −1.10 11 −1.045 (ASP) 0.219 12 Lens 6 0.769(ASP) 0.287 Plastic 1.614 26.0 3.42 13 1.040 (ASP) 0.300 14 IR-cutfilter Plano 0.110 Glass 1.517 64.2 — 15 Plano 0.418 16 Image Plano —Note: Reference wavelength is 587.6 nm (d-line).

TABLE 2 Aspheric Coefficients Surface # 1 2 3 4 5 6 k =   4.4599E−01  6.4654E−03 −1.1494E+00 −2.0909E−01   3.2530E+00   4.9995E+01 A4 =−1.2559E−02 −3.6443E−02 −9.4149E−02   3.5427E−01 −9.3235E−02 −6.4321E−01A6 =   4.7427E−03 −1.9591E−02   2.3356E−01 −4.9639E−02   7.9119E−02  1.0114E+00 A8 = −9.2299E−04   1.4576E−02 −1.1329E−01   4.3835E−03−5.3597E−01 −2.1290E+00 A10 =   6.0087E−05 −5.0800E−03   1.4218E−02  3.4971E−01 —   2.2313E+00 Surface # 8 9 10 11 12 13 k = −1.7021E+01−1.8708E+00 −2.8471E+00 −2.9989E+00 −5.9180E+00 −1.8050E+00 A4 =−3.1452E−01   8.9294E−01   3.5799E−01   4.3030E−01 −1.8396E−01−5.0354E−01 A6 =   5.9901E−01 −5.6508E+00 −3.4393E+00 −1.1851E+00−5.3496E−01   1.8531E−01 A8 = −3.5390E+00   1.0786E+01   7.7025E+00  3.0389E+00   8.6247E−01   2.0132E−02 A10 =   4.7185E+00 −8.5099E+00−4.5509E+00 −3.1218E+00 −4.5645E−01 −4.7658E−02 A12 = —   2.6487E+00−9.8354E−01   1.0612E+00   8.5658E−02   1.6223E−02

In Table 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-16 represent the surfacessequentially arranged from the object side to the image side along theoptical axis. In Table 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A12 represent the asphericcoefficients ranging from the 4th order to the 12th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as Table 1 and Table 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an image capturing unit according to the2nd embodiment of the present disclosure. FIG. 4 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 2ndembodiment. In FIG. 3, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 290. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 210, a second lens element 220, an aperture stop 200, a thirdlens element 230, a fourth lens element 240, a fifth lens element 250, asixth lens element 260, an IR-cut filter 270 and an image surface 280.The optical imaging lens assembly includes six lens elements (210, 220,230, 240, 250 and 260) with no additional lens element disposed betweeneach of the adjacent six lens elements.

The first lens element 210 with negative refractive power has anobject-side surface 211 being convex in a paraxial region thereof and animage-side surface 212 being concave in a paraxial region thereof. Thefirst lens element 210 is made of plastic material and has theobject-side surface 211 and the image-side surface 212 being bothaspheric.

The second lens element 220 with negative refractive power has anobject-side surface 221 being concave in a paraxial region thereof andan image-side surface 222 being convex in a paraxial region thereof. Thesecond lens element 220 is made of plastic material and has theobject-side surface 221 and the image-side surface 222 being bothaspheric.

The third lens element 230 with positive refractive power has anobject-side surface 231 being convex in a paraxial region thereof and animage-side surface 232 being convex in a paraxial region thereof. Thethird lens element 230 is made of plastic material and has theobject-side surface 231 and the image-side surface 232 being bothaspheric.

The fourth lens element 240 with positive refractive power has anobject-side surface 241 being convex in a paraxial region thereof and animage-side surface 242 being convex in a paraxial region thereof. Thefourth lens element 240 is made of plastic material and has theobject-side surface 241 and the image-side surface 242 being bothaspheric.

The fifth lens element 250 with negative refractive power has anobject-side surface 251 being concave in a paraxial region thereof andan image-side surface 252 being convex in a paraxial region thereof. Thefifth lens element 250 is made of plastic material and has theobject-side surface 251 and the image-side surface 252 being bothaspheric. The image-side surface 252 of the fifth lens element 250 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 260 with positive refractive power has anobject-side surface 261 being convex in a paraxial region thereof and animage-side surface 262 being concave in a paraxial region thereof. Thesixth lens element 260 is made of plastic material and has theobject-side surface 261 and the image-side surface 262 being bothaspheric. Each of the object-side surface 261 and the image-side surface262 of the sixth lens element 260 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 270 is made of glass material and located between thesixth lens element 260 and the image surface 280, and will not affectthe focal length of the optical imaging lens assembly. The image sensor290 is disposed on or near the image surface 280 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 251 of the fifth lens element 250 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 251 of the fifth lens element 250 is0.421.

The detailed optical data of the 2nd embodiment are shown in Table 3 andthe aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 1.09 mm, Fno = 1.98, HFOV = 75.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 10.719 (ASP) 0.350 Plastic 1.534 55.9−2.83  2 1.310 (ASP) 0.865  3 Lens 2 −2.437 (ASP) 1.202 Plastic 1.58230.2 −66.00  4 −3.074 (ASP) 0.254  5 Ape. Stop Plano −0.088  6 Lens 31.176 (ASP) 0.368 Plastic 1.544 55.9 2.00  7 −12.848 (ASP) 0.299  8 Lens4 4.957 (ASP) 0.650 Plastic 1.544 55.9 1.61  9 −1.014 (ASP) 0.103 10Lens 5 −0.421 (ASP) 0.201 Plastic 1.669 19.5 −1.33 11 −0.956 (ASP) 0.19012 Lens 6 0.770 (ASP) 0.427 Plastic 1.544 55.9 2.84 13 1.236 (ASP) 0.30014 IR-cut filter Plano 0.110 Glass 1.517 — — 15 Plano 0.369 16 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 1 2 3 k =   9.1950E+00−8.9629E−01   2.8837E−01 A4 = −3.5589E−02 −8.2833E−02 −1.1542E−01 A6 =  3.2885E−02   1.9605E−01   1.6821E−01 A8 = −1.5866E−02 −5.2708E−01−6.4855E−02 A10 =   5.0481E−03   1.0502E+00   3.2295E−03 A12 =−1.0391E−03 −1.1565E+00 — A14 =   1.1782E−04   6.6948E−01 — A16 =−5.2419E−06 −1.5742E−01 — Surface # 4 6 7 k =   1.4782E+01   1.9997E+00−8.7110E+01 A4 = −1.9359E−01 −6.8819E−01 −6.3498E−01 A6 =   1.4174E+00  9.8622E−01   7.8736E−01 A8 = −2.4006E+00 −1.9695E+00 −9.6320E−01 A10 =  2.5639E+00 —   1.9687E+00 A12 = — — — A14 = — — — A16 = — — — Surface# 8 9 10 k = −3.8588E+01 −7.6453E−01 −2.8341E+00 A4 = −5.8682E−01−1.3642E−01 −4.1443E−01 A6 =   5.1959E−01 −2.0219E+00   2.5905E+00 A8 =−2.3135E+00   4.6302E+00 −1.2451E+01 A10 =   3.8574E+00 −1.9707E+00  2.7465E+01 A12 = — −6.9199E−01 −2.0582E+01 Surface # 11 12 13 k =−5.0191E+00 −7.3968E+00 −1.0984E+00 A4 = −5.6598E−02 −5.4853E−02−3.5622E−01 A6 =   2.4689E+00 −9.3338E−01 −9.2861E−02 A8 = −7.2367E+00  1.8448E+00   3.9195E−01 A10 =   9.3877E+00 −1.7425E+00 −3.2862E−01 A12= −4.5509E+00   6.1040E−01   8.6527E−02

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3 and Table 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 1.09 f/R10 −1.14 Fno 1.98 f/R12 0.88 HFOV [deg.]75.0 |R11/CT6| + |R12/CT6| 4.70 FOV [deg.] 150.0 CT2/CT3 3.27 V5 + V675.39 ΣAT/T12 1.88 (R5 + R6)/(R5 − R6) −0.83 Yc61/Yc62 0.85 |f/R3| +|f/R4| 0.80 — —

3rd Embodiment

FIG. 5 is a schematic view of an image capturing unit according to the3rd embodiment of the present disclosure. FIG. 6 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 3rdembodiment. In FIG. 5, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 390. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 310, a second lens element 320, a third lens element 330, anaperture stop 300, a fourth lens element 340, a fifth lens element 350,a sixth lens element 360, an IR-cut filter 370 and an image surface 380.The optical imaging lens assembly includes six lens elements (310, 320,330, 340, 350 and 360) with no additional lens element disposed betweeneach of the adjacent six lens elements.

The first lens element 310 with negative refractive power has anobject-side surface 311 being concave in a paraxial region thereof andan image-side surface 312 being concave in a paraxial region thereof.The first lens element 310 is made of plastic material and has theobject-side surface 311 and the image-side surface 312 being bothaspheric.

The second lens element 320 with positive refractive power has anobject-side surface 321 being concave in a paraxial region thereof andan image-side surface 322 being convex in a paraxial region thereof. Thesecond lens element 320 is made of plastic material and has theobject-side surface 321 and the image-side surface 322 being bothaspheric.

The third lens element 330 with positive refractive power has anobject-side surface 331 being convex in a paraxial region thereof and animage-side surface 332 being convex in a paraxial region thereof. Thethird lens element 330 is made of plastic material and has theobject-side surface 331 and the image-side surface 332 being bothaspheric.

The fourth lens element 340 with positive refractive power has anobject-side surface 341 being concave in a paraxial region thereof andan image-side surface 342 being convex in a paraxial region thereof. Thefourth lens element 340 is made of plastic material and has theobject-side surface 341 and the image-side surface 342 being bothaspheric.

The fifth lens element 350 with negative refractive power has anobject-side surface 351 being concave in a paraxial region thereof andan image-side surface 352 being convex in a paraxial region thereof. Thefifth lens element 350 is made of plastic material and has theobject-side surface 351 and the image-side surface 352 being bothaspheric. The image-side surface 352 of the fifth lens element 350 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 360 with positive refractive power has anobject-side surface 361 being convex in a paraxial region thereof and animage-side surface 362 being concave in a paraxial region thereof. Thesixth lens element 360 is made of plastic material and has theobject-side surface 361 and the image-side surface 362 being bothaspheric. Each of the object-side surface 361 and the image-side surface362 of the sixth lens element 360 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 370 is made of glass material and located between thesixth lens element 360 and the image surface 380, and will not affectthe focal length of the optical imaging lens assembly. The image sensor390 is disposed on or near the image surface 380 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 351 of the fifth lens element 350 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 351 of the fifth lens element 350 is0.356.

The detailed optical data of the 3rd embodiment are shown in Table 5 andthe aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 1.12 mm, Fno = 2.05, HFOV = 94.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 −5.964 (ASP) 0.500 Plastic 1.545 56.0−3.27  2 2.616 (ASP) 1.036  3 Lens 2 −1.475 (ASP) 0.798 Plastic 1.56045.0 32.86  4 −1.631 (ASP) 0.082  5 Lens 3 1.580 (ASP) 0.364 Plastic1.545 56.0 2.19  6 −4.498 (ASP) −0.026  7 Ape. Stop Plano 0.333  8 Lens4 −100.000 (ASP) 0.884 Plastic 1.545 56.0 1.12  9 −0.606 (ASP) 0.080 10Lens 5 −0.356 (ASP) 0.220 Plastic 1.688 18.7 −0.99 11 −0.935 (ASP) 0.11412 Lens 6 0.648 (ASP) 0.271 Plastic 1.639 23.5 2.60 13 0.890 (ASP) 0.30014 IR-cut filter Plano 0.200 Glass 1.517 64.2 — 15 Plano 0.444 16 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line). An effectiveradius of the object-side surface 321 (Surface 3) is 0.970 mm.

TABLE 6 Aspheric Coefficients Surface # 1 2 3 k =   9.7556E−01  8.6927E−01 −1.0256E+00 A4 =   8.6072E−02   1.1879E−01 −4.5856E−03 A6 =−2.1978E−02   3.7734E−02 −4.6693E−02 A8 =   2.8381E−03   1.7197E−02  1.7391E−01 A10 = −1.5018E−04 −1.2846E−02 −8.7496E−02 Surface # 4 5 6 k=   2.1482E+00   3.2530E+00   4.9995E+01 A4 =   1.4980E−01 −1.6627E−01−1.7469E−01 A6 =   1.7330E−01 −2.6848E−01 −8.1279E−02 A8 = −4.5040E−02  2.0968E−01   9.1083E−02 A10 =   5.0967E−01 —   2.5621E+00 Surface # 89 10 k = −1.7021E+01 −1.7670E+00 −2.9490E+00 A4 = −3.0800E−01  6.0180E−01 −5.8803E−01 A6 =   6.0083E−01 −4.4538E+00   2.3192E+00 A8 =−5.0777E+00   9.3229E+00 −7.0469E+00 A10 =   8.8068E+00 −8.9467E+00  1.2369E+01 A12 = —   3.9855E+00 −7.9835E+00 Surface # 11 12 13 k =−3.1460E+00 −5.9180E+00 −1.8050E+00 A4 = −1.8358E−01 −2.7177E−01−6.1247E−01 A6 =   1.7277E+00   7.3054E−02   6.0525E−01 A8 = −2.9542E+00  1.4393E−02 −5.1498E−01 A10 =   2.4271E+00   1.2347E−02   2.5819E−01A12 = −8.2578E−01 −7.9150E−03 −5.0153E−02

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 5 and Table 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 1.12 f/R10 −1.20 Fno 2.05 f/R12 1.26 HFOV [deg.]94.0 |R11/CT6| + |R12/CT6| 5.67 FOV [deg.] 188.0 CT2/CT3 2.19 V5 + V642.19 ΣAT/T12 1.56 (R5 + R6)/(R5 − R6) −0.48 Yc61/Yc62 1.00 |f/R3| +|f/R4| 1.45 — —

4th Embodiment

FIG. 7 is a schematic view of an image capturing unit according to the4th embodiment of the present disclosure. FIG. 8 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 4thembodiment. In FIG. 7, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 490. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 410, a second lens element 420, a third lens element 430, anaperture stop 400, a fourth lens element 440, a fifth lens element 450,a sixth lens element 460, an IR-cut filter 470 and an image surface 480.The optical imaging lens assembly includes six lens elements (410, 420,430, 440, 450 and 460) with no additional lens element disposed betweeneach of the adjacent six lens elements.

The first lens element 410 with negative refractive power has anobject-side surface 411 being convex in a paraxial region thereof and animage-side surface 412 being concave in a paraxial region thereof. Thefirst lens element 410 is made of glass material and has the object-sidesurface 411 and the image-side surface 412 being both aspheric.

The second lens element 420 with negative refractive power has anobject-side surface 421 being concave in a paraxial region thereof andan image-side surface 422 being convex in a paraxial region thereof. Thesecond lens element 420 is made of glass material and has theobject-side surface 421 and the image-side surface 422 being bothaspheric.

The third lens element 430 with positive refractive power has anobject-side surface 431 being convex in a paraxial region thereof and animage-side surface 432 being convex in a paraxial region thereof. Thethird lens element 430 is made of glass material and has the object-sidesurface 431 and the image-side surface 432 being both aspheric.

The fourth lens element 440 with positive refractive power has anobject-side surface 441 being concave in a paraxial region thereof andan image-side surface 442 being convex in a paraxial region thereof. Thefourth lens element 440 is made of plastic material and has theobject-side surface 441 and the image-side surface 442 being bothaspheric.

The fifth lens element 450 with negative refractive power has anobject-side surface 451 being concave in a paraxial region thereof andan image-side surface 452 being convex in a paraxial region thereof. Thefifth lens element 450 is made of plastic material and has theobject-side surface 451 and the image-side surface 452 being bothaspheric. The image-side surface 452 of the fifth lens element 450 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 460 with positive refractive power has anobject-side surface 461 being convex in a paraxial region thereof and animage-side surface 462 being concave in a paraxial region thereof. Thesixth lens element 460 is made of plastic material and has theobject-side surface 461 and the image-side surface 462 being bothaspheric. Each of the object-side surface 461 and the image-side surface462 of the sixth lens element 460 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 470 is made of glass material and located between thesixth lens element 460 and the image surface 480, and will not affectthe focal length of the optical imaging lens assembly. The image sensor490 is disposed on or near the image surface 480 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 451 of the fifth lens element 450 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 451 of the fifth lens element 450 is0.361.

The detailed optical data of the 4th embodiment are shown in Table 7 andthe aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 1.15 mm, Fno = 2.05, HFOV = 94.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 3.243 (ASP) 0.500 Glass 1.610 57.9 −3.55 2 1.224 (ASP) 0.957  3 Lens 2 −1.746 (ASP) 0.973 Glass 1.853 39.0−17.99  4 −2.475 (ASP) 0.174  5 Lens 3 1.323 (ASP) 0.403 Glass 1.51863.5 1.79  6 −2.746 (ASP) −0.035  7 Ape. Stop Plano 0.498  8 Lens 4−16.531 (ASP) 0.595 Plastic 1.544 56.0 1.55  9 −0.811 (ASP) 0.104 10Lens 5 −0.361 (ASP) 0.220 Plastic 1.669 19.5 −1.19 11 −0.824 (ASP) 0.08012 Lens 6 0.626 (ASP) 0.318 Plastic 1.560 40.0 2.39 13 0.962 (ASP) 0.30014 IR-cut filter Plano 0.110 Glass 1.517 64.2 — 15 Plano 0.403 16 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line).

TABLE 8 Aspheric Coefficients Surface # 1 2 3 k = −1.7903E+01−8.0072E−01 −2.3869E+00 A4 =   2.2070E−04 −6.7759E−02 −5.2840E−02 A6 =  1.1122E−03   7.7609E−02   1.0984E−01 A8 = −1.3032E−04 −5.7811E−02−4.8038E−02 A10 = −5.3186E−06   2.7983E−02   4.5727E−03 Surface # 4 5 6k =   3.7890E+00   1.6941E+00 −1.9349E+01 A4 =   9.6339E−02 −1.4435E−01−2.6698E−01 A6 =   1.5349E−01   1.1122E−02   2.1004E−01 A8 = −1.1533E−01−3.1924E−01 −3.3392E−02 A10 =   1.8457E−01 — — Surface # 8 9 10 k =  8.1974E+01 −1.2948E+00 −2.9193E+00 A4 = −3.7429E−01 −1.0711E−01−5.0771E−01 A6 =   8.7898E−01 −8.7749E−01   1.1272E+00 A8 = −5.2246E+00  2.0823E−01 −3.1957E+00 A10 =   6.8071E+00   2.7177E+00   8.6898E+00A12 = — −1.5365E+00 −7.5925E+00 Surface # 11 12 13 k = −2.5527E+00−5.3659E+00 −9.8612E−01 A4 =   4.0303E−01 −1.7086E−01 −6.3835E−01 A6 =−9.0760E−01 −5.2219E−01   2.9678E−01 A8 =   2.2854E+00   7.6208E−01−8.9063E−02 A10 = −2.2005E+00 −3.7239E−01 −3.9488E−03 A12 =   6.6038E−01  6.5110E−02   1.0841E−02

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 7 and Table 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 1.15 f/R10 −1.39 Fno 2.05 f/R12 1.19 HFOV [deg.]94.0 |R11/CT6| + |R12/CT6| 4.99 FOV [deg.] 188.0 CT2/CT3 2.41 V5 + V659.45 ΣAT/T12 1.86 (R5 + R6)/(R5 − R6) −0.35 Yc61/Yc62 0.95 |f/R3| +|f/R4| 1.12 — —

5th Embodiment

FIG. 9 is a schematic view of an image capturing unit according to the5th embodiment of the present disclosure. FIG. 10 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 5thembodiment. In FIG. 9, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 590. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 510, a second lens element 520, a third lens element 530, anaperture stop 500, a fourth lens element 540, a fifth lens element 550,a sixth lens element 560, an IR-cut filter 570 and an image surface 580.The optical imaging lens assembly includes six lens elements (510, 520,530, 540, 550 and 560) with no additional lens element disposed betweeneach of the adjacent six lens elements.

The first lens element 510 with negative refractive power has anobject-side surface 511 being convex in a paraxial region thereof and animage-side surface 512 being concave in a paraxial region thereof. Thefirst lens element 510 is made of glass material and has the object-sidesurface 511 and the image-side surface 512 being both spherical.

The second lens element 520 with positive refractive power has anobject-side surface 521 being concave in a paraxial region thereof andan image-side surface 522 being convex in a paraxial region thereof. Thesecond lens element 520 is made of plastic material and has theobject-side surface 521 and the image-side surface 522 being bothaspheric.

The third lens element 530 with positive refractive power has anobject-side surface 531 being convex in a paraxial region thereof and animage-side surface 532 being concave in a paraxial region thereof. Thethird lens element 530 is made of plastic material and has theobject-side surface 531 and the image-side surface 532 being bothaspheric. The image-side surface 532 of the third lens element 530 hasat least one convex critical point in an off-axis region thereof.

The fourth lens element 540 with positive refractive power has anobject-side surface 541 being convex in a paraxial region thereof and animage-side surface 542 being convex in a paraxial region thereof. Thefourth lens element 540 is made of plastic material and has theobject-side surface 541 and the image-side surface 542 being bothaspheric.

The fifth lens element 550 with negative refractive power has anobject-side surface 551 being concave in a paraxial region thereof andan image-side surface 552 being convex in a paraxial region thereof. Thefifth lens element 550 is made of plastic material and has theobject-side surface 551 and the image-side surface 552 being bothaspheric. The image-side surface 552 of the fifth lens element 550 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 560 with positive refractive power has anobject-side surface 561 being convex in a paraxial region thereof and animage-side surface 562 being concave in a paraxial region thereof. Thesixth lens element 560 is made of plastic material and has theobject-side surface 561 and the image-side surface 562 being bothaspheric. The image-side surface 562 of the sixth lens element 560 hasat least one critical point in an off-axis region thereof.

The IR-cut filter 570 is made of glass material and located between thesixth lens element 560 and the image surface 580, and will not affectthe focal length of the optical imaging lens assembly. The image sensor590 is disposed on or near the image surface 580 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 551 of the fifth lens element 550 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 551 of the fifth lens element 550 is0.442.

The detailed optical data of the 5th embodiment are shown in Table 9 andthe aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 1.04 mm, Fno = 2.04, HFOV = 90.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 5.686 0.400 Glass 1.772 49.6 −1.91  21.138 1.112  3 Lens 2 −2.883 (ASP) 1.267 Plastic 1.544 56.0 1.92  4−0.886 (ASP) 0.030  5 Lens 3 5.021 (ASP) 0.300 Plastic 1.544 56.0 20.53 6 8.927 (ASP) −0.056  7 Ape. Stop Plano 0.467  8 Lens 4 4.124 (ASP)0.545 Plastic 1.544 56.0 1.73  9 −1.161 (ASP) 0.137 10 Lens 5 −0.442(ASP) 0.260 Plastic 1.660 20.4 −1.20 11 −1.241 (ASP) 0.058 12 Lens 61.030 (ASP) 0.418 Plastic 1.544 56.0 2.34 13 4.671 (ASP) 0.300 14 IR-cutfilter Plano 0.110 Glass 1.517 64.2 — 15 Plano 0.652 16 Image Plano —Note: Reference wavelength is 587.6 nm (d-line).

TABLE 10 Aspheric Coefficients Surface # 3 4 5 6 8 k =   2.4651E−01−2.5979E+00 −6.9507E+00   1.5217E+01 −1.6075E+01 A4 = −1.2155E−01  3.0336E−01 −1.4564E−01 −1.1974E+00 −3.3081E−01 A6 =   2.1980E−02−9.5831E−01   6.7138E−01   2.6741E+00 −7.7425E−02 A8 =   3.5614E−02  2.1115E+00 −3.6475E+00 −5.5773E+00   3.7411E+00 A10 =   2.4540E−02−2.5659E+00   7.5622E+00   6.0555E+00 −1.3155E+01 A12 = −2.3345E−02  1.4789E+00 −7.3583E+00 −2.6877E+00   1.2909E+01 Surface # 9 10 11 1213 k = −1.8109E−01 −3.0895E+00 −2.3790E+01 −2.7794E+00 −1.6907E−05 A4 =−1.5186E−01 −3.7292E−01 −2.1860E−01 −5.6866E−01   5.0383E−02 A6 =  7.2148E−01   1.5504E+00   1.6651E+00   1.4422E+00 −1.6696E−01 A8 =−5.0959E+00 −9.1921E+00 −5.6014E+00 −2.7778E+00   1.6806E−01 A10 =  8.3864E+00   2.0421E+01   1.1264E+01   3.4520E+00 −2.1307E−01 A12 =−3.2362E+00 −1.3857E+01 −1.0591E+01 −2.4824E+00   2.5022E−01 A14 = —  1.3593E−01   3.6652E+00   9.4417E−01 −1.4283E−01 A16 = — — —−1.4863E−01   2.8816E−02

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 9 and Table 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 1.04 f/R10 −0.84 Fno 2.04 f/R12 0.22 HFOV [deg.]90.0 |R11/CT6| + |R12/CT6| 13.64 FOV [deg.] 180.0 CT2/CT3 4.22 V5 + V676.38 ΣAT/T12 1.57 (R5 + R6)/(R5 − R6) −3.57 Yc61/Yc62 — |f/R3| + |f/R4|1.53 — —

6th Embodiment

FIG. 11 is a schematic view of an image capturing unit according to the6th embodiment of the present disclosure. FIG. 12 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 6thembodiment. In FIG. 11, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 690. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 610, a second lens element 620, a third lens element 630, anaperture stop 600, a fourth lens element 640, a fifth lens element 650,a sixth lens element 660, an IR-cut filter 670 and an image surface 680.The optical imaging lens assembly includes six lens elements (610, 620,630, 640, 650 and 660) with no additional lens element disposed betweeneach of the adjacent six lens elements.

The first lens element 610 with negative refractive power has anobject-side surface 611 being convex in a paraxial region thereof and animage-side surface 612 being concave in a paraxial region thereof. Thefirst lens element 610 is made of glass material and has the object-sidesurface 611 and the image-side surface 612 being both spherical.

The second lens element 620 with positive refractive power has anobject-side surface 621 being concave in a paraxial region thereof andan image-side surface 622 being convex in a paraxial region thereof. Thesecond lens element 620 is made of plastic material and has theobject-side surface 621 and the image-side surface 622 being bothaspheric.

The third lens element 630 with positive refractive power has anobject-side surface 631 being convex in a paraxial region thereof and animage-side surface 632 being concave in a paraxial region thereof. Thethird lens element 630 is made of plastic material and has theobject-side surface 631 and the image-side surface 632 being bothaspheric. The image-side surface 632 of the third lens element 630 hasat least one convex critical point in an off-axis region thereof.

The fourth lens element 640 with positive refractive power has anobject-side surface 641 being convex in a paraxial region thereof and animage-side surface 642 being convex in a paraxial region thereof. Thefourth lens element 640 is made of plastic material and has theobject-side surface 641 and the image-side surface 642 being bothaspheric.

The fifth lens element 650 with negative refractive power has anobject-side surface 651 being concave in a paraxial region thereof andan image-side surface 652 being convex in a paraxial region thereof. Thefifth lens element 650 is made of plastic material and has theobject-side surface 651 and the image-side surface 652 being bothaspheric. The image-side surface 652 of the fifth lens element 650 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 660 with positive refractive power has anobject-side surface 661 being convex in a paraxial region thereof and animage-side surface 662 being concave in a paraxial region thereof. Thesixth lens element 660 is made of plastic material and has theobject-side surface 661 and the image-side surface 662 being bothaspheric. Each of the object-side surface 661 and the image-side surface662 of the sixth lens element 660 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 670 is made of glass material and located between thesixth lens element 660 and the image surface 680, and will not affectthe focal length of the optical imaging lens assembly. The image sensor690 is disposed on or near the image surface 680 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 651 of the fifth lens element 650 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 651 of the fifth lens element 650 is0.312.

The detailed optical data of the 6th embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 1.24 mm, Fno = 2.05, HFOV = 89.9 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 9.262 0.750 Glass 1.835 42.7 −3.20  21.999 0.839  3 Lens 2 −1.523 (ASP) 0.736 Plastic 1.544 56.0 5.30  4−1.166 (ASP) 0.030  5 Lens 3 1.826 (ASP) 0.310 Plastic 1.544 56.0 5.22 6 4.813 (ASP) 0.002  7 Ape. Stop Plano 0.339  8 Lens 4 2.289 (ASP)0.844 Plastic 1.544 56.0 1.35  9 −0.936 (ASP) 0.152 10 Lens 5 −0.312(ASP) 0.228 Plastic 1.660 20.4 −0.92 11 −0.828 (ASP) 0.030 12 Lens 60.529 (ASP) 0.340 Plastic 1.544 56.0 1.50 13 1.172 (ASP) 0.500 14 IR-cutfilter Plano 0.110 Glass 1.517 64.2 — 15 Plano 0.291 16 Image Plano —Note: Reference wavelength is 587.6 nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 3 4 5 6 8 k = −1.9335E+00−3.2088E−01 −2.9557E−01   5.8433E+01 −1.1793E+01 A4 = −1.0763E−01  4.3118E−01 −6.4719E−02 −9.6105E−01 −3.2419E−01 A6 =   2.1921E−01−1.9142E−01   1.0698E−01   1.0642E+00   4.8745E−01 A8 = −1.0601E−01  1.5723E−01 −6.8161E−01 −1.7274E+00 −3.8016E+00 A10 =   1.0217E−02  3.8311E−01 — —   5.2937E+00 Surface # 9 10 11 12 13 k = −8.0797E−01−3.2414E+00 −4.5791E+00 −6.4410E+00 −7.5770E−01 A4 =   4.5509E−03−1.6387E+00 −4.4550E−01   5.6089E−02 −2.7169E−01 A6 = −3.5305E+00  5.0800E+00   2.1965E+00 −5.0549E−01 −1.2904E−01 A8 =   1.2224E+01−7.4846E+00 −3.2512E+00   4.1099E−01   1.7761E−01 A10 = −1.7407E+01  6.2495E+00   2.3060E+00 −1.0649E−01 −8.2823E−02 A12 =   9.6546E+00−2.4899E+00 −6.6621E−01   5.6796E−03   1.6374E−02

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 11 and Table 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 1.24 f/R10 −1.50 Fno 2.05 f/R12 1.06 HFOV [deg.]89.9 |R11/CT6| + |R12/CT6| 5.00 FOV [deg.] 179.8 CT2/CT3 2.37 V5 + V676.38 ΣAT/T12 1.66 (R5 + R6)/(R5 − R6) −2.22 Yc61/Yc62 0.97 |f/R3| +|f/R4| 1.88 — —

7th Embodiment

FIG. 13 is a schematic view of an image capturing unit according to the7th embodiment of the present disclosure. FIG. 14 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 7thembodiment. In FIG. 13, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 790. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 710, an aperture stop 700, a second lens element 720, a thirdlens element 730, a stop 701, a fourth lens element 740, a fifth lenselement 750, a sixth lens element 760, an IR-cut filter 770 and an imagesurface 780. The optical imaging lens assembly includes six lenselements (710, 720, 730, 740, 750 and 760) with no additional lenselement disposed between each of the adjacent six lens elements.

The first lens element 710 with negative refractive power has anobject-side surface 711 being concave in a paraxial region thereof andan image-side surface 712 being concave in a paraxial region thereof.The first lens element 710 is made of plastic material and has theobject-side surface 711 and the image-side surface 712 being bothaspheric.

The second lens element 720 with negative refractive power has anobject-side surface 721 being concave in a paraxial region thereof andan image-side surface 722 being concave in a paraxial region thereof.The second lens element 720 is made of plastic material and has theobject-side surface 721 and the image-side surface 722 being bothaspheric.

The third lens element 730 with positive refractive power has anobject-side surface 731 being convex in a paraxial region thereof and animage-side surface 732 being convex in a paraxial region thereof. Thethird lens element 730 is made of plastic material and has theobject-side surface 731 and the image-side surface 732 being bothaspheric.

The fourth lens element 740 with positive refractive power has anobject-side surface 741 being convex in a paraxial region thereof and animage-side surface 742 being convex in a paraxial region thereof. Thefourth lens element 740 is made of plastic material and has theobject-side surface 741 and the image-side surface 742 being bothaspheric.

The fifth lens element 750 with negative refractive power has anobject-side surface 751 being concave in a paraxial region thereof andan image-side surface 752 being convex in a paraxial region thereof. Thefifth lens element 750 is made of plastic material and has theobject-side surface 751 and the image-side surface 752 being bothaspheric. The image-side surface 752 of the fifth lens element 750 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 760 with negative refractive power has anobject-side surface 761 being convex in a paraxial region thereof and animage-side surface 762 being concave in a paraxial region thereof. Thesixth lens element 760 is made of plastic material and has theobject-side surface 761 and the image-side surface 762 being bothaspheric. Each of the object-side surface 761 and the image-side surface762 of the sixth lens element 760 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 770 is made of glass material and located between thesixth lens element 760 and the image surface 780, and will not affectthe focal length of the optical imaging lens assembly. The image sensor790 is disposed on or near the image surface 780 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 751 of the fifth lens element 750 is smaller thanthe absolute values of the curvature radii of the other surfaces of thesix lens elements. In detail, the absolute value of the curvature radiusof the object-side surface 751 of the fifth lens element 750 is 0.577.

The detailed optical data of the 7th embodiment are shown in Table 13and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 1.83 mm, Fno = 2.40, HFOV = 60.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 −100.000 (ASP) 0.518 Plastic 1.544 55.9−5.20  2 2.912 (ASP) 0.403  3 Ape. Stop Plano 0.067  4 Lens 2 −43.201(ASP) 0.227 Plastic 1.660 20.4 −9.40  5 7.257 (ASP) 0.051  6 Lens 313.620 (ASP) 0.660 Plastic 1.544 55.9 1.65  7 −0.945 (ASP) −0.200  8Stop Plano 0.240  9 Lens 4 11.165 (ASP) 0.919 Plastic 1.544 55.9 2.40 10−1.438 (ASP) 0.281 11 Lens 5 −0.577 (ASP) 0.280 Plastic 1.660 20.4 −2.5912 −1.038 (ASP) 0.352 13 Lens 6 1.124 (ASP) 0.300 Plastic 1.639 23.5−19.49 14 0.924 (ASP) 0.400 15 IR-cut filter Plano 0.110 Glass 1.51764.2 — 16 Plano 0.180 17 Image Plano — Note: Reference wavelength is587.6 nm (d-line). An effective radius of the stop 701 (Surface 8) is0.950 mm.

TABLE 14 Aspheric Coefficients

1 2 4 k =   3.3804E+01 −2.6042E+00 −9.0000E+01 A4 =   1.5727E−01  2.9443E−01 −4.3376E−01 A6 = −5.8766E−02   6.5113E−01   1.2395E−01 A8 =  1.4725E−02 −3.9461E+00 −1.0130E+00 A10 =   7.4826E−03   1.1330E+01−6.6061E+00 A12 = −3.7295E−03 −1.4910E+01 — A14 =   4.1923E−04  7.0401E+00 — A16 = — — —

5 6 7 k = −7.4851E+01 −8.6745E+01 −2.8287E−01 A4 = −4.9087E−01−3.6805E−01 −6.7690E−02 A6 =   8.8813E−01   3.7001E−01 −2.9225E−01 A8 =−1.3067E−01   4.9943E+00   2.5052E+00 A10 = −3.4030E+00 −1.6200E+01−5.9415E+00 A12 =   1.7370E+00   2.0008E+01   6.9575E+00 A14 = —−9.0106E+00 −2.5205E+00 A16 = — — −2.5737E−01 Surface # 9 10 11 k =  4.1209E+01 −1.8045E+00 −1.6207E+00 A4 = −1.2626E−01   1.2495E−02  3.5404E−01 A6 =   3.2790E−01 −3.7485E−01 −8.8339E−01 A8 = −1.9351E−01  1.0310E+00   1.8658E+00 A10 = −1.9137E−01 −1.4140E+00 −2.3480E+00 A12=   3.6604E−01   1.0100E+00   1.6197E+00 A14 = −2.2802E−01 −3.4985E−01−5.6302E−01 A16 =   5.2665E−02   4.6921E−02   7.6913E−02 Surface # 12 1314 k = −8.5522E−01 −1.3882E+00 −9.3618E−01 A4 =   1.8032E−01 −7.3419E−01−6.1683E−01 A6 =   4.5143E−02   3.5824E−01   3.5245E−01 A8 = −1.7118E−01−4.6880E−01 −1.4464E−01 A10 =   2.3402E−01   4.9699E−01   3.6243E−02 A12= −1.4009E−01 −2.3618E−01 −4.8798E−03 A14 =   3.8004E−02   5.1713E−02  3.0608E−04 A16 = −3.8891E−03 −4.3327E−03 −7.2507E−06

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 13 and Table 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 1.83 f/R10 −1.76 Fno 2.40 f/R12 1.98 HFOV [deg.]60.0 |R11/CT6| + |R12/CT6| 6.83 FOV [deg.] 120.0 CT2/CT3 0.34 V5 + V643.89 ΣAT/T12 2.54 (R5 + R6)/(R5 − R6) 0.87 Yc61/Yc62 0.63 |f/R3| +|f/R4| 0.29 — —

8th Embodiment

FIG. 15 is a schematic view of an image capturing unit according to the8th embodiment of the present disclosure. FIG. 16 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 8thembodiment. In FIG. 15, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 890. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 810, an aperture stop 800, a second lens element 820, a thirdlens element 830, a stop 801, a fourth lens element 840, a fifth lenselement 850, a sixth lens element 860, an IR-cut filter 870 and an imagesurface 880. The optical imaging lens assembly includes six lenselements (810, 820, 830, 840, 850 and 860) with no additional lenselement disposed between each of the adjacent six lens elements.

The first lens element 810 with negative refractive power has anobject-side surface 811 being concave in a paraxial region thereof andan image-side surface 812 being concave in a paraxial region thereof.The first lens element 810 is made of plastic material and has theobject-side surface 811 and the image-side surface 812 being bothaspheric.

The second lens element 820 with negative refractive power has anobject-side surface 821 being concave in a paraxial region thereof andan image-side surface 822 being concave in a paraxial region thereof.The second lens element 820 is made of plastic material and has theobject-side surface 821 and the image-side surface 822 being bothaspheric.

The third lens element 830 with positive refractive power has anobject-side surface 831 being convex in a paraxial region thereof and animage-side surface 832 being convex in a paraxial region thereof. Thethird lens element 830 is made of plastic material and has theobject-side surface 831 and the image-side surface 832 being bothaspheric.

The fourth lens element 840 with positive refractive power has anobject-side surface 841 being convex in a paraxial region thereof and animage-side surface 842 being convex in a paraxial region thereof. Thefourth lens element 840 is made of plastic material and has theobject-side surface 841 and the image-side surface 842 being bothaspheric.

The fifth lens element 850 with negative refractive power has anobject-side surface 851 being concave in a paraxial region thereof andan image-side surface 852 being convex in a paraxial region thereof. Thefifth lens element 850 is made of plastic material and has theobject-side surface 851 and the image-side surface 852 being bothaspheric. The image-side surface 852 of the fifth lens element 850 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 860 with negative refractive power has anobject-side surface 861 being convex in a paraxial region thereof and animage-side surface 862 being concave in a paraxial region thereof. Thesixth lens element 860 is made of plastic material and has theobject-side surface 861 and the image-side surface 862 being bothaspheric. Each of the object-side surface 861 and the image-side surface862 of the sixth lens element 860 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 870 is made of glass material and located between thesixth lens element 860 and the image surface 880, and will not affectthe focal length of the optical imaging lens assembly. The image sensor890 is disposed on or near the image surface 880 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 851 of the fifth lens element 850 is smaller thanthe absolute values of the curvature radii of the other surfaces of thesix lens elements. In detail, the absolute value of the curvature radiusof the object-side surface 851 of the fifth lens element 850 is 0.583.

The detailed optical data of the 8th embodiment are shown in Table 15and the aspheric surface data are shown in Table 16 below.

TABLE 15 8th Embodiment f = 1.82 mm, Fno = 2.30, HFOV = 58.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 −5.636 (ASP) 0.604 Plastic 1.534 55.9−6.48  2 9.309 (ASP) 0.418  3 Ape. Stop Plano 0.076  4 Lens 2 −7.676(ASP) 0.239 Plastic 1.669 19.5 −10.65  5 100.000 (ASP) 0.040  6 Lens 38.209 (ASP) 0.655 Plastic 1.544 56.0 1.70  7 −1.016 (ASP) −0.200  8 StopPlano 0.240  9 Lens 4 18.371 (ASP) 0.850 Plastic 1.544 56.0 2.64 10−1.530 (ASP) 0.279 11 Lens 5 −0.583 (ASP) 0.280 Plastic 1.669 19.5 −2.5612 −1.054 (ASP) 0.284 13 Lens 6 1.010 (ASP) 0.328 Plastic 1.633 23.4−81.01 14 0.866 (ASP) 0.400 15 IR-cut filter Plano 0.110 Glass 1.51764.2 — 16 Plano 0.245 17 Image Plano — Note: Reference wavelength is587.6 nm (d-line). An effective radius of the stop 801 (Surface 8) is0.950 mm.

TABLE 16 Aspheric Coefficients Surface # 1 2 4 k =   1.0329E+01  8.2507E+01 −9.0000E+01 A4 =   2.1125E−01   4.0020E−01 −3.8170E−01 A6 =−1.4002E−01 −2.3043E−01   6.8889E−01 A8 =   9.2856E−02 −4.3009E−01−3.5835E+00 A10 = −3.8039E−02   2.0085E+00   3.0627E−01 A12 =  9.2287E−03 −2.0747E+00 — A14 = −8.7444E−04   5.4810E−01 — A16 = — — —Surface # 5 6 7 k = −7.4851E+01   7.9114E+01 −2.2128E−01 A4 =−5.2385E−01 −5.1980E−01 −1.8295E−01 A6 =   1.2635E+00   1.3917E+00  1.0040E+00 A8 = −8.0097E−01   3.2024E−02 −3.5576E+00 A10 = −3.1877E+00−4.6165E+00   1.0423E+01 A12 =   2.4738E+00   7.1420E+00 −2.0052E+01 A14= — −3.5310E+00   2.1485E+01 A16 = — — −8.8427E+00

9 10 11 k =   4.1209E+01 −1.6987E+00 −1.6016E+00 A4 = −1.4434E−01  2.4992E−02   4.8998E−01 A6 =   6.4054E−01 −7.1556E−01 −2.0893E+00 A8 =−1.1753E+00   2.3104E+00   5.4002E+00 A10 =   1.3609E+00 −3.2956E+00−7.3656E+00 A12 = −1.1353E+00   2.2970E+00   5.3942E+00 A14 =  5.7592E−01 −7.5528E−01 −2.0061E+00 A16 = −1.2066E−01   9.3461E−02  2.9712E−01

12 13 14 k = −8.6845E−01 −1.3485E+00 −9.6099E−01 A4 =   2.2047E−01−7.3218E−01 −6.4244E−01 A6 = −2.9112E−01   3.2534E−01   3.4864E−01 A8 =  4.5829E−01 −4.5217E−01 −1.0962E−01 A10 = −2.8090E−01   5.3263E−01  4.9460E−03 A12 =   7.5812E−02 −2.7279E−01   7.3268E−03 A14 =−8.0668E−03   6.3879E−02 −1.9383E−03 A16 =   1.1505E−04 −5.7154E−03  1.5148E−04

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 15 and Table 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 1.82 f/R10 −1.72 Fno 2.30 f/R12 2.10 HFOV [deg.]58.4 |R11/CT6| + |R12/CT6| 5.72 FOV [deg.] 116.8 CT2/CT3 0.36 V5 + V642.81 ΣAT/T12 2.30 (R5 + R6)/(R5 − R6) 0.78 Yc61/Yc62 0.65 |f/R3| +|f/R4| 0.25 — —

9th Embodiment

FIG. 17 is a schematic view of an image capturing unit according to the9th embodiment of the present disclosure. FIG. 18 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 9thembodiment. In FIG. 17, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 990. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 910, an aperture stop 900, a second lens element 920, a thirdlens element 930, a stop 901, a fourth lens element 940, a fifth lenselement 950, a sixth lens element 960, an IR-cut filter 970 and an imagesurface 980. The optical imaging lens assembly includes six lenselements (910, 920, 930, 940, 950 and 960) with no additional lenselement disposed between each of the adjacent six lens elements.

The first lens element 910 with negative refractive power has anobject-side surface 911 being concave in a paraxial region thereof andan image-side surface 912 being concave in a paraxial region thereof.The first lens element 910 is made of plastic material and has theobject-side surface 911 and the image-side surface 912 being bothaspheric.

The second lens element 920 with negative refractive power has anobject-side surface 921 being concave in a paraxial region thereof andan image-side surface 922 being convex in a paraxial region thereof. Thesecond lens element 920 is made of plastic material and has theobject-side surface 921 and the image-side surface 922 being bothaspheric.

The third lens element 930 with positive refractive power has anobject-side surface 931 being convex in a paraxial region thereof and animage-side surface 932 being convex in a paraxial region thereof. Thethird lens element 930 is made of plastic material and has theobject-side surface 931 and the image-side surface 932 being bothaspheric.

The fourth lens element 940 with positive refractive power has anobject-side surface 941 being concave in a paraxial region thereof andan image-side surface 942 being convex in a paraxial region thereof. Thefourth lens element 940 is made of plastic material and has theobject-side surface 941 and the image-side surface 942 being bothaspheric.

The fifth lens element 950 with negative refractive power has anobject-side surface 951 being concave in a paraxial region thereof andan image-side surface 952 being convex in a paraxial region thereof. Thefifth lens element 950 is made of plastic material and has theobject-side surface 951 and the image-side surface 952 being bothaspheric. The image-side surface 952 of the fifth lens element 950 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 960 with negative refractive power has anobject-side surface 961 being convex in a paraxial region thereof and animage-side surface 962 being concave in a paraxial region thereof. Thesixth lens element 960 is made of plastic material and has theobject-side surface 961 and the image-side surface 962 being bothaspheric. Each of the object-side surface 961 and the image-side surface962 of the sixth lens element 960 has at least one critical point in anoff-axis region thereof.

The IR-cut filter 970 is made of glass material and located between thesixth lens element 960 and the image surface 980, and will not affectthe focal length of the optical imaging lens assembly. The image sensor990 is disposed on or near the image surface 980 of the optical imaginglens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 951 of the fifth lens element 950 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 951 of the fifth lens element 950 is0.587.

The detailed optical data of the 9th embodiment are shown in Table 17and the aspheric surface data are shown in Table 18 below.

TABLE 17 9th Embodiment f = 1.76 mm, Fno = 2.30, HFOV = 60.2 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 −4.377 (ASP) 0.674 Plastic 1.534 55.9−5.63  2 10.087 (ASP) 0.468  3 Ape. Stop Plano 0.074  4 Lens 2 −6.809(ASP) 0.241 Plastic 1.669 19.5 −17.67  5 −16.288 (ASP) 0.040  6 Lens 36.437 (ASP) 0.683 Plastic 1.544 56.0 1.60  7 −0.972 (ASP) −0.200  8 StopPlano 0.240  9 Lens 4 −121.662 (ASP) 0.662 Plastic 1.544 56.0 3.05 10−1.642 (ASP) 0.276 11 Lens 5 −0.587 (ASP) 0.325 Plastic 1.669 19.5 −2.8012 −1.044 (ASP) 0.287 13 Lens 6 1.073 (ASP) 0.300 Plastic 1.660 20.4−62.24 14 0.929 (ASP) 0.400 15 IR-cut filter Plano 0.110 Glass 1.51764.2 — 16 Plano 0.319 17 Image Plano — Note: Reference wavelength is587.6 nm (d-line). An effective radius of the stop 901 (Surface 8) is0.950 mm.

TABLE 18 Aspheric Coefficients Surface # 1 2 4 k =   4.5993E+00  8.6367E+01 −7.8745E+01 A4 =   1.9398E−01   4.1660E−01 −3.5101E−01 A6 =−1.2499E−01 −8.9810E−01   1.6706E+00 A8 =   7.9905E−02   3.6554E+00−3.0538E+01 A10 = −3.4591E−02 −1.0124E+01   2.6641E+02 A12 =  9.7709E−03   1.7038E+01 −1.2906E+03 A14 = −1.5355E−03 −1.4766E+01  3.1693E+03 A16 =   1.0047E−04   4.9090E+00 −3.3296E+03 Surface # 5 6 7k =   5.1819E+01   4.3596E+01 −3.5952E−01 A4 = −1.3190E−01 −7.1019E−02  8.7356E−02 A6 = −1.4466E+00 −1.1054E+00   1.8912E−01 A8 =   7.5809E+00  5.9078E+00 −2.7339E+00 A10 = −6.1157E+00 −9.3006E+00   8.9196E+00 A12= −5.0550E+01   2.9644E+00 −1.5318E+01 A14 =   1.4500E+02   6.0485E+00  1.5975E+01 A16 = −1.2990E+02 −4.6405E+00 −6.8629E+00 Surface # 9 10 11k = −8.8437E+01 −1.3418E+00 −1.6205E+00 A4 =   6.3764E−02 −4.6683E−02  3.7142E−01 A6 = −8.6371E−02 −3.8595E−01 −1.7434E+00 A8 = −3.4406E−01  2.4630E+00   5.6606E+00 A10 =   6.4314E−01 −5.4965E+00 −9.4224E+00 A12= −1.9612E−01   5.4777E+00   8.2432E+00 A14 = −2.1771E−01 −2.5112E+00−3.6241E+00 A16 =   1.2319E−01   4.3721E−01   6.3296E−01 Surface # 12 1314 k = −8.8484E−01 −1.3922E+00 −9.5905E−01 A4 =   2.4637E−01 −6.4745E−01−5.5862E−01 A6 = −4.6967E−01   3.6470E−01   1.7560E−01 A8 =   7.3178E−01−1.0781E+00   4.5090E−02 A10 = −3.9754E−01   1.4044E+00 −8.0645E−02 A12=   4.5865E−02 −7.7629E−01   3.7678E−02 A14 =   2.3847E−02   1.9838E−01−7.9595E−03 A16 = −5.7013E−03 −1.9465E−02   6.4499E−04

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 9th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 17 and Table 18as the following values and satisfy the following conditions:

9th Embodiment f [mm] 1.76 f/R10 −1.68 Fno 2.30 f/R12 1.89 HFOV [deg.]60.2 |R11/CT6| + |R12/CT6| 6.67 FOV [deg.] 120.4 CT2/CT3 0.35 V5 + V639.85 ΣAT/T12 2.19 (R5 + R6)/(R5 − R6) 0.74 Yc61/Yc62 0.70 |f/R3| +|f/R4| 0.37 — —

10th Embodiment

FIG. 19 is a schematic view of an image capturing unit according to the10th embodiment of the present disclosure. FIG. 20 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 10thembodiment. In FIG. 19, the image capturing unit includes the opticalimaging lens assembly (its reference numeral is omitted) of the presentdisclosure and an image sensor 1090. The optical imaging lens assemblyincludes, in order from an object side to an image side, a first lenselement 1010, a second lens element 1020, a third lens element 1030, anaperture stop 1000, a fourth lens element 1040, a fifth lens element1050, a sixth lens element 1060, an IR-cut filter 1070 and an imagesurface 1080. The optical imaging lens assembly includes six lenselements (1010, 1020, 1030, 1040, 1050 and 1060) with no additional lenselement disposed between each of the adjacent six lens elements.

The first lens element 1010 with negative refractive power has anobject-side surface 1011 being convex in a paraxial region thereof andan image-side surface 1012 being concave in a paraxial region thereof.The first lens element 1010 is made of glass material and has theobject-side surface 1011 and the image-side surface 1012 being bothspherical.

The second lens element 1020 with positive refractive power has anobject-side surface 1021 being concave in a paraxial region thereof andan image-side surface 1022 being convex in a paraxial region thereof.The second lens element 1020 is made of plastic material and has theobject-side surface 1021 and the image-side surface 1022 being bothaspheric.

The third lens element 1030 with positive refractive power has anobject-side surface 1031 being convex in a paraxial region thereof andan image-side surface 1032 being concave in a paraxial region thereof.The third lens element 1030 is made of plastic material and has theobject-side surface 1031 and the image-side surface 1032 being bothaspheric.

The fourth lens element 1040 with positive refractive power has anobject-side surface 1041 being convex in a paraxial region thereof andan image-side surface 1042 being convex in a paraxial region thereof.The fourth lens element 1040 is made of plastic material and has theobject-side surface 1041 and the image-side surface 1042 being bothaspheric.

The fifth lens element 1050 with negative refractive power has anobject-side surface 1051 being concave in a paraxial region thereof andan image-side surface 1052 being convex in a paraxial region thereof.The fifth lens element 1050 is made of plastic material and has theobject-side surface 1051 and the image-side surface 1052 being bothaspheric. The image-side surface 1052 of the fifth lens element 1050 hasat least one concave critical point in an off-axis region thereof.

The sixth lens element 1060 with positive refractive power has anobject-side surface 1061 being convex in a paraxial region thereof andan image-side surface 1062 being convex in a paraxial region thereof.The sixth lens element 1060 is made of plastic material and has theobject-side surface 1061 and the image-side surface 1062 being bothaspheric. Each of the object-side surface 1061 and the image-sidesurface 1062 of the sixth lens element 1060 has at least one criticalpoint in an off-axis region thereof.

The IR-cut filter 1070 is made of glass material and located between thesixth lens element 1060 and the image surface 1080, and will not affectthe focal length of the optical imaging lens assembly. The image sensor1090 is disposed on or near the image surface 1080 of the opticalimaging lens assembly.

In this embodiment, an absolute value of a curvature radius of theobject-side surface 1051 of the fifth lens element 1050 is smaller thanthe absolute values of the curvature radii of the other lens surfaces ofthe six lens elements. In detail, the absolute value of the curvatureradius of the object-side surface 1051 of the fifth lens element 1050 is0.260.

The detailed optical data of the 10th embodiment are shown in Table 19and the aspheric surface data are shown in Table 20 below.

TABLE 19 10th Embodiment f = 1.13 mm, Fno = 2.04, HFOV = 90.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length  0Object Plano Infinity  1 Lens 1 11.134 0.800 Glass 1.835 42.7 −3.67  2 2.326 1.078  3 Lens 2 −1.233 (ASP) 0.745 Plastic 1.544 56.0 39.32  4−1.414 (ASP) 0.030  5 Lens 3 1.085 (ASP) 0.504 Plastic 1.544 56.0 2.73 6 3.364 (ASP) 0.226  7 Ape. Stop Plano 0.164  8 Lens 4 3.419 (ASP)0.785 Plastic 1.544 56.0 1.37  9 −0.873 (ASP) 0.161 10 Lens 5 −0.260(ASP) 0.220 Plastic 1.660 20.4 −0.89 11 −0.626 (ASP) 0.030 12 Lens 60.700 (ASP) 0.593 Plastic 1.544 56.0 1.24 13 −12.554 (ASP) 0.300 14IR-cut filter Plano 0.110 Glass 1.517 64.2 — 15 Plano 0.253 16 ImagePlano — Note: Reference wavelength is 587.6 nm (d-line). An effectiveradius of the image-side surface 1012 (Surface 2) is 1.425 mm.

TABLE 20 Aspheric Coefficients Surface # 3 4 5 6 8 k = −4.6321E+00  5.4783E−01 −1.6227E+00   1.5294E+01   1.1953E+01 A4 = −1.4889E−01  1.5996E−01   7.3616E−02 −3.6357E−01 −4.3165E−01 A6 =   1.5271E−01  1.0213E−01   2.9189E−01   2.1755E−01   2.5459E−01 A8 = −5.0938E−02−6.7030E−02 −4.3527E−01 −1.0590E−02 −5.1646E+00 A10 =   2.3247E−03  8.7923E−02   5.6406E−01 —   3.9133E+00 A12 =   1.1904E−03 — — — —Surface # 9 10 11 12 13 k = −4.2613E−01 −2.4738E+00 −7.0257E+00−7.3842E+00   7.6416E+01 A4 =   1.4450E−01 −1.1205E+00 −8.4752E−01−3.0535E−01   2.8911E−01 A6 = −3.3941E+00   5.6773E+00   3.8546E+00  8.0081E−01 −3.9262E−01 A8 =   1.5695E+01 −1.1709E+01 −7.4006E+00−2.2391E+00 −7.6365E−02 A10 = −3.8033E+01   9.9224E+00   8.8619E+00  2.9446E+00   4.1754E−01 A12 =   4.4064E+01   3.0705E+00 −5.9093E+00−1.9125E+00 −3.1574E−01 A14 = −1.7759E+01 −6.7744E+00   1.5923E+00  6.1540E−01   1.0063E−01 A16 = — — — −7.8936E−02 −1.1278E−02

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 10th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 19 and Table 20as the following values and satisfy the following conditions:

10th Embodiment f [mm] 1.13 f/R10 −1.81 Fno 2.04 f/R12 −0.09 HFOV [deg.]90.0 |R11/CT6| + |R12/CT6| 22.35 FOV [deg.] 180.0 CT2/CT3 1.48 V5 + V676.38 ΣAT/T12 1.57 (R5 + R6)/(R5 − R6) −1.95 Yc61/Yc62 1.14 |f/R3| +|f/R4| 1.72 — —

11th Embodiment

FIG. 21 is a perspective view of an image capturing unit according tothe 11th embodiment of the present disclosure. In this embodiment, animage capturing unit 10 is a camera module including a lens unit 11, adriving device 12, an image sensor 13 and an image stabilizer 14. Thelens unit 11 includes the optical imaging lens assembly disclosed in the1st embodiment, a barrel and a holder member (their reference numeralsare omitted) for holding the optical imaging lens assembly. The imaginglight converges in the lens unit 11 of the image capturing unit 10 togenerate an image while utilizing the driving device 12 for imagefocusing on the image sensor 13, and the generated image is thendigitally transmitted to other electronic component for furtherprocessing.

The driving device 12 can have auto focusing functionality, anddifferent driving configurations can be obtained through the usages ofvoice coil motors (VCM), micro electro-mechanical systems (MEMS),piezoelectric systems, or shape memory alloy materials. The drivingdevice 12 is favorable for obtaining a better imaging position of thelens unit 11, so that a clear image of the imaged object can be capturedby the lens unit 11 with different object distances. The image sensor 13(for example, CCD or CMOS), which can feature high photosensitivity andlow noise, is disposed on the image surface of the optical imaging lensassembly to provide higher image quality.

The image stabilizer 14, such as an accelerometer, a gyro sensor and aHall Effect sensor, is configured to work with the driving device 12 toprovide optical image stabilization (OIS). The driving device 12 workingwith the image stabilizer 14 is favorable for compensating for pan andtilt of the lens unit 11 to reduce blurring associated with motionduring exposure. In some cases, the compensation can be provided byelectronic image stabilization (EIS) with image processing software,thereby improving the image quality while in motion or low-lightconditions.

12th Embodiment

FIG. 22 is one perspective view of an electronic device according to the12th embodiment of the present disclosure. FIG. 23 is anotherperspective view of the electronic device in FIG. 22. FIG. 24 is a blockdiagram of the electronic device in FIG. 22. In this embodiment, anelectronic device 20 is a smartphone including the image capturing unit10 disclosed in the 11th embodiment, a flash module 21, a focus assistmodule 22, an image signal processor 23, a user interface 24 and animage software processor 25. In this embodiment, the electronic device20 includes one image capturing unit 10, but the disclosure is notlimited thereto. In some cases, the electronic device 20 can includemultiple image capturing units 10, or the electronic device 20 furtherincludes another different image capturing unit.

When a user captures images of an object 26 through the user interface24, the light rays converge in the image capturing unit 10 to generatean image, and the flash module 21 is activated for light supplement. Thefocus assist module 22 detects the object distance of the imaged object26 to achieve fast auto focusing.

The image signal processor 23 is configured to optimize the capturedimage to improve the image quality. The light beam emitted from thefocus assist module 22 can be either conventional infrared or laser. Theuser interface 24 can be a touch screen or a physical button. The useris able to interact with the user interface 24 and the image softwareprocessor 25 having multiple functions to capture images and completeimage processing.

The smartphone in this embodiment is only exemplary for showing theimage capturing unit 10 of the present disclosure installed in anelectronic device, and the present disclosure is not limited thereto.The image capturing unit 10 can be optionally applied to optical systemswith a movable focus. Furthermore, the optical imaging lens assembly ofthe image capturing unit 10 features good capability in aberrationcorrections and high image quality, and can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart televisions,network surveillance devices, dashboard cameras, vehicle backup cameras,multi-camera devices, image recognition systems, motion sensing inputdevices, wearable devices and other electronic imaging devices.

The foregoing description, for the purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTABLES 1-20 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An optical imaging lens assembly comprising sixlens elements, the six lens elements being, in order from an object sideto an image side, a first lens element, a second lens element, a thirdlens element, a fourth lens element, a fifth lens element and a sixthlens element; the first lens element having negative refractive power,the second lens element having an object-side surface being concave in aparaxial region thereof and an image-side surface being convex in aparaxial region thereof, the third lens element having an object-sidesurface being convex in a paraxial region thereof, the fifth lenselement with negative refractive power having an object-side surfacebeing concave in a paraxial region thereof and an image-side surfacebeing convex in a paraxial region thereof, the sixth lens element havingan image-side surface being concave in a paraxial region thereof, atleast one of an object-side surface and the image-side surface of thesixth lens element having at least one critical point in an off-axisregion thereof, and the object-side surface and the image-side surfaceof the sixth lens element being both aspheric; wherein a curvatureradius of the object-side surface of the third lens element is R5, acurvature radius of an image-side surface of the third lens element isR6, a focal length of the optical imaging lens assembly is f, acurvature radius of the image-side surface of the sixth lens element isR12, and the following conditions are satisfied: (R5+R6)/(R5−R6)<0.20;and 0.75<f/R12.
 2. The optical imaging lens assembly of claim 1, whereinan f-number of the optical imaging lens assembly is Fno, a maximum fieldof view of the optical imaging lens assembly is FOV, and the followingconditions are satisfied: 1.20<Fno<2.40; and 110 [deg.]<FOV<220 [deg.].3. The optical imaging lens assembly of claim 1, wherein a sum of axialdistances between each of all adjacent lens elements of the opticalimaging lens assembly is ΣAT, an axial distance between the first lenselement and the second lens element is T12, and the following conditionis satisfied: 1.0<ΣAT/T12<2.0.
 4. The optical imaging lens assembly ofclaim 1, wherein the focal length of the optical imaging lens assemblyis f, a curvature radius of an object-side surface of the second lenselement is R3, a curvature radius of an image-side surface of the secondlens element is R4, and the following condition is satisfied:0.60<|f/R3|+|f/R4|<3.0.
 5. The optical imaging lens assembly of claim 1,wherein a central thickness of the second lens element is CT2, a centralthickness of the third lens element is CT3, and the following conditionis satisfied: 1.0<CT2/CT3.
 6. The optical imaging lens assembly of claim1, wherein an Abbe number of the fifth lens element is V5, an Abbenumber of the sixth lens element is V6, and the following condition issatisfied: V5+V6<65.
 7. The optical imaging lens assembly of claim 1,wherein a curvature radius of the object-side surface of the sixth lenselement is R11, the curvature radius of the image-side surface of thesixth lens element is R12, a central thickness of the sixth lens elementis CT6, and the following condition is satisfied:|R11/CT6|+|R12/CT6|<10.
 8. The optical imaging lens assembly of claim 1,wherein a vertical distance between a non-axial critical point on theobject-side surface of the sixth lens element and an optical axis isYc61, a vertical distance between a non-axial critical point on theimage-side surface of the sixth lens element and the optical axis isYc62, and the following condition is satisfied: 0.50<Yc61/Yc62<2.0. 9.The optical imaging lens assembly of claim 1, wherein the third lenselement has positive refractive power, the curvature radius of theobject-side surface of the third lens element is R5, the curvatureradius of the image-side surface of the third lens element is R6, andthe following condition is satisfied: −4.5<(R5+R6)/(R5−R6)<−0.40. 10.The optical imaging lens assembly of claim 1, wherein the fourth lenselement with positive refractive power has an object-side surface beingconvex in a paraxial region thereof and an image-side surface beingconvex in a paraxial region thereof.
 11. The optical imaging lensassembly of claim 1, wherein the image-side surface of the fifth lenselement has at least one concave critical point in an off-axis regionthereof.
 12. An image capturing unit, comprising: the optical imaginglens assembly of claim 1; and an image sensor disposed on an imagesurface of the optical imaging lens assembly.
 13. An electronic device,comprising: the image capturing unit of claim
 12. 14. An optical imaginglens assembly comprising six lens elements, the six lens elements being,in order from an object side to an image side, a first lens element, asecond lens element, a third lens element, a fourth lens element, afifth lens element and a sixth lens element; the first lens elementhaving negative refractive power, the second lens element having anobject-side surface being concave in a paraxial region thereof, thethird lens element having an object-side surface being convex in aparaxial region thereof and an image-side surface being concave in aparaxial region thereof, the fifth lens having negative refractivepower, the sixth lens element having an image-side surface being concavein a paraxial region thereof, at least one of an object-side surface andthe image-side surface of the sixth lens element having at least onecritical point in an off-axis region thereof, and the object-sidesurface and the image-side surface of the sixth lens element being bothaspheric; wherein a focal length of the optical imaging lens assembly isf, a curvature radius of the image-side surface of the sixth lenselement is R12, and the following condition is satisfied: 0.75<f/R12.15. The optical imaging lens assembly of claim 14, wherein a sum ofaxial distances between each of all adjacent lens elements of theoptical imaging lens assembly is ΣAT, an axial distance between thefirst lens element and the second lens element is T12, and the followingcondition is satisfied: 1.0<ΣAT/T12<2.0.
 16. The optical imaging lensassembly of claim 14, wherein a central thickness of the second lenselement is CT2, a central thickness of the third lens element is CT3,and the following condition is satisfied: 1.0<CT2/CT3.
 17. The opticalimaging lens assembly of claim 14, wherein a curvature radius of theobject-side surface of the third lens element is R5, a curvature radiusof the image-side surface of the third lens element is R6, and thefollowing condition is satisfied: −3.0<(R5+R6)/(R5−R6)<−1.0.
 18. Theoptical imaging lens assembly of claim 14, wherein the image-sidesurface of the third lens element has at least one convex critical pointin an off-axis region thereof.
 19. The optical imaging lens assembly ofclaim 14, wherein an absolute value of a curvature radius of anobject-side surface of the fifth lens element is a minimum amongabsolute values of curvature radii of all lens surfaces of the six lenselements.
 20. The optical imaging lens assembly of claim 14, wherein animage-side surface of the fifth lens element has at least one concavecritical point in an off-axis region thereof.